neck vs solid ground

neck and solid ground both are nouns.

Word	Noun	Adjective	Verb	Adverb
neck	Yes	No	Yes	No
solid ground	Yes	No	No	No

As nouns, solid ground is a hypernym of neck; that is, solid ground is a word with a broader meaning than neck:

Other hypernyms of neck include dry land, earth, ground, land, terra firma.

neck (noun)	solid ground (noun)
an opening in a garment for the neck of the wearer; a part of the garment near the wearer's neck	the solid part of the earth's surface
a narrow part of an artifact that resembles a neck in position or form
the part of an organism (human or animal) that connects the head to the rest of the body
a cut of meat from the neck of an animal
a narrow elongated projecting strip of land

neck (verb)	solid ground (verb)
kiss, embrace, or fondle with sexual passion